John Peter Cronan (born 1976) is an American lawyer serving as a United States district judge of the United States District Court for the Southern District of New York. He was formerly acting United States assistant attorney general for the United States Department of Justice Criminal Division.

- Gender
- Male
- Race
- White
Prior employment
Criminal Division, U.S. Department of JusticePrincipal deputy assistant attorney general · 2017–2020- ↳acting assistant attorney general · 2017–2018
Assistant U.S. attorney · 2007–2017- ↳deputy chief, Terrorism and International Narcotics Unit · 2014–2016
- ↳chief/co-chief, Terrorism and International Narcotics Unit · 2016–2017
Adjunct clinical professor of law · 2015–2017
Assistant U.S. attorney · 2003–2007
Law clerk , Hon. Robert A. Katzmann · 2002–2003
Law clerk , Hon. Barrington D. Parker · 2001–2002
Law clerk , Hon. Barrington D. Parker · 2001
Appointments
2020–present · Appointed by Donald J. Trump (Republican)
2002–2003

Education
J.D. · 2001- Yale Universityjd · 2001
- Georgetown UniversityB.A. · 1998
- Georgetown Universitymagna cum laude · 1998